结论在根除病灶的基础上保存并提高听力，IBM合并后鼓室径路为慢性化脓性中耳乳突炎外科手术的合理选择。
Conclusion IBM combined with posterior tympanum is a good choice for preserving or improving hearing based on eradication of the focus among patients with chronic suppurative otitis media.
前言：目的：探讨经扩大迷路进路摘除伴发慢性中耳乳突炎的大听神经瘤的手术方法。
Objective: To investigate the surgical methods and results of enlarged translabyrinthine approach in the removal of large acoustic neuromas accompanied with chronic otitis media.
目的：确定慢性化脓性中耳乳突炎的双螺旋CT扫描诊断价值。
Purpose To recognize the value of double helix CT in diagnosis of Chronic otitis mastoidea.
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